MASTER DISK FOR MAGNETIC TRANSFER, A METHOD OF DRAWING A MAGNETIC TRANSFER PATTERN, AND A MAGNETIC RECORDING MEDIUM HAVING A TRANSFERRED MAGNETIC TRANSFER PATTERN - A master disk for magnetic transfer of a reference servo signal in a spiral mode, having a pattern including a plurality of dots groups, which are disposed at different radial positions of the master disk with a first pitch, and correspond to the reference servo signal in the spiral mode. Each of the plurality of dot groups includes a plurality of dots, successively disposed with a second pitch along a circumferential direction of the master disk at a same one of the radial positions. Each of the plurality of dots is of a ferromagnetic material, and has four sides, two opposing sides thereof extending in the circumferential direction, and the other two opposing sides thereof extending in a radial direction of the master disk.

04-28-2011

20140300983

MEDIA STORAGE AND MANAGEMENT SYSTEM - A media data storage system comprising a data management portion, a local data storage portion, and a remote data storage portion. One data management portion comprises instructions associated with an intake, modification, transfer, and providing of media information. The local data storage portion comprises one or more first media data tape libraries adapted to receive the media information. The remote data storage portion comprises one or more second media data tape libraries adapted to receive the media information. Furthermore, the data management portion is adapted to instruct the local data storage portion to remove at least a portion of the media information from the one or more first media tape libraries upon verifying that the remote data storage portion comprises the at least a portion of the media information.

10-09-2014

20130321944

SERVER AND METHOD FOR PREVENTING THE SERVER FROM VIBRATION DAMAGE - In a method for preventing a server from a damage vibration, a first system log records detected vibration intensity of the server, and suspends a working operation of the hard disk if the detected vibration intensity of the server is greater than or equal to a predefined vibration intensity is determined. Data stored in the hard disk is copied to a solid-state drive (SSD) if the detected vibration intensity of the server is greater than or equal to the predefined vibration intensity, and an operating system of the server hibernates. The operating system of the server does not wake up until the detected vibration stops for a second predefined time period after the operating system of the server hibernates.

12-05-2013

20120182639

String Searching Within Peripheral Storage Devices - Systems and methods for retrieving data stored on a peripheral storage device such as a magnetic tape drive or disk drive include string searching using the peripheral storage device resources without transferring data to the requesting host computer and transferring only data blocks with matching data to the associated host computer to conserve host resources and data channel and/or network bandwidth.

07-19-2012

20090290245

DATA STORAGE DEVICE - A data storage device includes: a recording medium that has two or more system data recording areas where system data are recorded on a multiple basis, and a user data recording area where user data is recorded; a head that writes and reads data into and from the recording medium; and a system data update control section that causes the head to update the system data on the recording medium. The system data update control section causes the head to record new system data on a multiple basis in another sub-record area that is alternately selected at each update to the new system data over the two or more system data recording areas when each the two or more system data recording areas is divided into two sub-record areas, and read the new system data from the another sub-record area to confirm that the new system data is recorded correctly.

11-26-2009

20120327528

DATA DISTRIBUTION SYSTEM AND METHOD OF SAME, DATA PROCESSING APPARATUS AND METHOD OF SAME, AND DATA RECORDING MEDIUM - A data distribution system and method suitably performing various processing such as suitable distribution of data, control of copying, conversion of signals, charging, and distribution of profits, comprising a reproducing apparatus for reproducing content data to be distributed from a mounted recording medium, a recording apparatus for recording reproduced content data on a mounted recording medium, an examining means for examining types of content data recorded on the recording medium, the recording medium mounted in the reproducing apparatus, the reproducing apparatus, a recording medium mounted in the recording apparatus and the recording apparatus, and a controlling means for controlling a transfer of the content data from the recording medium mounted in the reproducing apparatus to the recording medium mounted in the recording apparatus based on results of the examination.

12-27-2012

20100027147

LOW POWER CONSUMPTION STORAGE ARRAY - Disclosed is a low power consumption storage array. Read and write cycles are separated so that a multiple disk array can be spun down during periods when there are no write requests. Cooling fans are operated with a pulse-width modulated signal in response to cooling demand to further reduce energy consumption.

02-04-2010

20100265607

TAPE CARTRIDGE PAIRED DATA - A method for maintaining paired data between tape cartridges and linking the paired data to through medium auxiliary memory devices is presented. One method includes providing a first tape cartridge possessing a first medium auxiliary memory device and a first tape medium and a second tape cartridge possessing a second medium auxiliary memory device and a second tape medium. Data maintained on the first tape medium can be copied to the second tape medium. A first record can be stored on the first medium auxiliary memory device indicating that data on the first tape medium was copied to the second tape medium. Likewise, a second record can be stored on the second medium auxiliary memory device indicating that data on the second tape medium originated from the first tape medium.

DATA ARCHIVE SYSTEM - In a virtual disk library device access of data stored in a tape can be conducted at a high speed with a high-speed archiving process from a disk to the tape in units of LUs maintained. The efficiency of update of the data stored in the tape can be improved. In this system, when the data stored in the tape is to be accessed with a high-speed archiving process in units of LUs from the disk to the tape maintained, a disk staging process is performed in the unit of a page that is smaller than the unit of an LU, and accordingly, high-speed access can be implemented. In addition, when an update process for the data (LU) stored in the tape is performed, the host can be responded by only staging an update target page of the LU, and a prior disk staging process is performed for the remaining pages of the LU in the background. Accordingly, when the data is re-stored in the tape, immediately storing the data in the tape can be performed without performing a staging process.

04-29-2010

20120262811

CONFIGURABLE TAPE LOADER WITH INTERNAL HARD-DISK - A data archiving apparatus includes an autoloader for automated transfer of data tape cartridges between at least one tape drive and storage locations of at least one cartridge storage magazine. One or more hard disks is mounted within the autoloader apparatus. The hard disk is connected for data transfer between the hard disk and the tape drive so that data caching can be accomplished during the data archiving process. Interface controls for both the tape drive and the one or more hard disks is provided within the housing of the data archiving apparatus to permit simultaneous operation of the hard disk and the tape drive and for data transfer there between. The hard disks may be exchanged by a user to increase data storage capacity.

10-18-2012

20100265606

TAPE DATA RECOVERY - A method for recovering data from a failed tape cartridge is presented. The reliability of a tape cartridge is assessed via the number of read errors encountered. If the number or read errors is excessive, the tape cartridge is deemed unreliable and the tape cartridge is restricted from storing anymore data. A search is performed to look for duplicate data and if found a copy of the duplicate data is stored to a replacement tape cartridge. The replacement tape cartridge assumes all identity of the original failed tape cartridge.

10-21-2010

20100142070

Storage system and operation method thereof - Aiming to suitably balance, when backing up data to a magnetic tape, search time and writing/reading performance depending on the purpose of the backup, provided is a disk array apparatus including a disk device having hard disks, a magnetic tape device including a magnetic tape to which data to be backed up is written, and a control unit performing writing and reading processings of data between the disk device and the magnetic tape device. The control unit includes an FM (file mark) interval managing unit which receives a purpose of use when backing up the data on the magnetic tape, and from FM intervals which is held in association with the purpose of use thus received and which indicates an interval of recording FMs on the magnetic tape, acquires an FM interval corresponding to the purpose of use thus received, and transmits the acquired FM interval to the control unit.

06-10-2010

20100142071

METHOD AND APPARATUS FOR TAPE DRIVE DATA LOGGING - Method and apparatus for logging of data within a data storage system, such as a tape drive library. The tape drive library includes a central storage (memory) providing storage space assigned to each tape drive in the tape drive library and allowing each tape drive to directly store data there, that is to log data files. The logging of the data files is at the instigation of each tape drive and not via polling, so as to perform logging synchronous with tape drive events. In one version, the tape drives are coupled to the central storage via an Ethernet network and the log files conform to a standard file protocol, such as a network file system.

06-10-2010

20130044386

TAPE DRIVE DEVICE, TAPE LIBRARY DEVICE, AND DATA STORING METHOD - A tape drive device for storing data in a tape cartridge includes a comparison unit that compares a transfer speed of the data transmitted from a host machine to the tape drive device with a speed threshold, a speed determination unit that determines a writing speed to a tape cartridge using the speed threshold, and a data write unit that writes data to the tape cartridge, the data write unit writing data to the magnetic tape provided for the tape cartridge when the determined writing speed is higher than the speed threshold, and the data write unit writing subsequent data following data written to the magnetic tape to the non-volatile semiconductor memory provided for the tape cartridge when the determined writing speed is lower than the speed threshold.

02-21-2013

20130242425

WRITE REORDERING IN A HYBRID DISK DRIVE - A hybrid drive and associated methods increase the rate at which data are transferred to a nonvolatile storage medium in the hybrid drive. By using a large nonvolatile solid state memory device as cache memory for a magnetic disk drive, a very large number of write commands can be cached and subsequently reordered and executed in an efficient manner. In addition, strategic selection and reordering of only a portion of the write commands stored in the nonvolatile solid state memory device increases efficiency of the reordering process.

09-19-2013

20120200951

CONTENT DUPLICATION DEVICE AND CONTENT DUPLICATION SYSTEM - A duplication device is provided. When content is duplicated by recording, in a recording medium of a recording destination, the same content as content recorded in a recording medium of a duplication source, even if a reading speed is slower than a writing speed, the duplication device can reduce a duplication time as much as possible. The duplication device

08-09-2012

20110188141

DATA BACK-UP METHOD AND APPARATUS USING THE SAME - A hard disk controller includes a track counter which counts the number of times each of a plurality of tracks included in each of a plurality of disks is accessed and a processing unit which compares each of a plurality of count values obtained by the counting performed by the track counter with an access reference value, and backs up data recorded on at least one of the plurality of tracks. The at least one track has a count value equal to or greater than the access reference value from among the plurality of count values.

08-04-2011

20080218889

INFORMATION TRANSFER MASTER FOR MAGNETIC TRANSFER AND MAGNETIC TRANSFER METHOD - An information transfer master has servo information pattern to be magnetically transferred to a magnetic recording medium having a lubrication layer thereon; and a contact surface to contact the magnetic recording medium has surface free energy that is 45 mN/m or less when the servo information pattern is magnetically transferred.

09-11-2008

20080259479

System and Methods for Copying Digital Information from a Digital Media - System and Methods for Copying Digital Information from a Digital Media Various embodiments of the present invention provide systems and methods for copying or ripping digital information contained on one media to another media. In particular, some embodiments of the present invention provide methods and systems for copying digital information contained in a first fixed media onto another media by using digital information content corresponding to that maintained on the first fixed media, but obtained from a database.

10-23-2008

20110317299

MAGNETIC RECORDING MEDIUM AND DISK DEVICE - According to one embodiment, a magnetic recording medium on which servo data is recorded by magnetic transfer recording, the medium includes a data recording area in which data is recorded on a plurality of data tracks extending in form of concentric circles, and a servo area comprising the servo data corresponding to the data tracks. The servo data includes a plurality of burst patterns for tracking detection, which are arranged in a circumferential direction of the data tracks, and the burst patterns comprise a number of recording crests which differs depending on a radial position on the magnetic recording medium.

12-29-2011

20150116857

TAPE APPARATUS, STORAGE CONTROL APPARATUS, AND STORAGE CONTROL METHOD - A tape apparatus includes a controller and a plurality of tape drives. The controller controls reading from and writing onto magnetic tapes by the use of the plurality of tape drives. Furthermore, when the controller receives a data write request, the controller writes received data both onto one of main data magnetic tapes and onto an auxiliary data magnetic tape. In addition, each time the controller receives a data write request, the controller writes received data onto a corresponding main data magnetic tape and adds the received data onto a common auxiliary data magnetic tape.

04-30-2015

20120300325

Shingle-written Magnetic Recording (SMR) Device with Hybrid E-region - SMR disk drives with hybrid E-regions that include a nonvolatile solid state memory E-region in addition to the magnetic media E-regions on disk are described. The memory E-region can be used in operations that will be referred as destaging and/or restaging to sequentialize sets of exception records to reduce the time and energy spent in executing seeks in the disk E-region. The ratio of the size of the solid state memory E-region to the total E-region capacity on the disks can be optimized for selected applications according to the invention using tradeoffs between performance and cost. For example, an embodiment with a memory E-region size that is 10% of the total disk E-region capacity achieves substantial performance enhancement over a disk-only E-region implementation and also results in smaller costs than would be required in a NAND-only memory E-region.

11-29-2012

20110122522

Tape Recorder And Tape Recording That Increases Empty Tape Area Without Loss of Necessary Data - Provided is a tape recorder that has a tape including at least one partition and that controls access to the tape. The tape recorder includes: means for identifying a position of data on the tape; means for sequentially reading necessary data areas in the data; means for sequentially copying the necessary data areas to the beginning of an empty area on the tape; means for creating a continuous front empty area formed of unnecessary data areas and copy source areas of the necessary data areas on the tape; and means for moving a beginning of the partition (BOP) to a position immediately after the front empty area and for updating the position information on the beginning of the partition.

05-26-2011

20120320470

TAPE CLEANER - A tape cartridge library that is equipped with a cleaning device is described. The tape cartridge library essentially includes a plurality of tape cartridges each possessing recording tape media. A plurality of tape drives that read and write data to and from each of the tape cartridges. A tape cleaning drive incapable of transferring data to and from the recording tape media which is independent of the tape drives, the tape cleaning drive disposed entirely within the tape cartridge library. The tape cleaning drive automatically receives one of the tape cartridges and cleans its respective recording tape medium when a predetermined reason for cleaning the tape cartridge is justified.

12-20-2012

20100238574

METHOD AND SYSTEM FOR GOVERNING AN ENTERPRISE LEVEL GREEN STORAGE SYSTEM DRIVE TECHNIQUE - A method and system for manipulating a spin state of each disk in a drive array is disclosed. In one embodiment, a method includes monitoring input/output (I/O) requests to each disk drive in a disk array and identifying any disk drive as an inactive disk drive based on a number of I/O requests directed to said any disk drive for a given time interval. The method further includes moving data from the inactive disk drive to an active disk drive having a free disk space to store the data and updating metadata associated with the data using a log-structured file system for the disk array. Further, the method includes manipulating a spin state of the inactive disk drive by spinning down the inactive disk drive to conserve power. Furthermore, the method includes redirecting subsequent I/O requests for the inactive disk drive to the active disk drive by accessing the metadata of the log-structured file system.

09-23-2010

20140185157

UTILIZATION OF DISK BUFFER FOR BACKGROUND REPLICATION PROCESSES - Embodiments of the present invention utilize a hard disk drive buffer to minimize seek delays during background replication of a first volume and fulfillment of application input/output requests. According to one aspect of the present invention, a requested first sector of data is read along with one or more additional sectors of data. Upon determining that one or more of the read sectors of data should be replicated, the sectors are read from the disk buffer and written to a second volume.

07-03-2014

20080198488

DATA DUPLICATOR - A data duplicator capable of copying data to a plurality of types of disk. Data are read from a source disk which serves as a source of duplication, and the read data are temporarily saved as FAT data in a hard disk drive. The type of a target disk which is loaded on a DVD drive and which serves as a destination of duplication is determined, and the disk is converted into a file system format conforming to the type of the disk, and the data are copied to the target disk.

08-21-2008

20120275046

SPLITTING A DATA STREAM BETWEEN TWO STORAGE MEDIA IN A HYBRID DISK DRIVE - A hybrid disk drive transfers a data stream to or from a host at an increased data transfer rate by time-multiplexing the data-carrying capacity of the system bus connecting the host and the disk drive. A portion of the data stream is stored on a non-volatile solid state memory device in the disk drive and a portion is written to a magnetic storage disk. The portion of the data stream written to the storage disk may be written on data tracks that are separated by empty data tracks corresponding to the data stored in the non-volatile solid state memory device.

11-01-2012

20090034107

REDUNDANT DATA ON HARD DRIVE - Duplicate copies of data may be stored in different sectors on the same track of a disk drive. When reading the data, the data may read from the sector that passes under the read head soonest, thus decreasing data access latency. In some embodiments, the duplicate sectors may be equally spaced around the track. In some embodiments, the spin rate of the disk drive may be reduced to save power, with the increased data latency that would normally be created by the reduced spin rate to be at least partially offset by the decreased data latency created by using multiple copies of the data in the different sectors

02-05-2009

20120162802

MAGNETIC DISK MEDIUM AND MAGNETIC TRANSFER DEVICE - According to one embodiment, a magnetic disk medium is pre-formatted on both the surfaces by magnetic transfer. Sectors with the same sector number on the front surface and the rear surface of the magnetic disk medium are arranged at positions shifted by a predetermined angle associated in advance with determination target information.

06-28-2012

20110286123

MANAGING WRITE OPERATIONS TO AN EXTENT OF TRACKS MIGRATED BETWEEN STORAGE DEVICES - Provided are a computer program product, system, and method for managing write operations to an extent of tracks migrated between storage device. An operation is processed to migrate an extent of tracks from the second storage to the first storage. A determination is made as to whether an extent object exists for the extent to migrate. The extent object exists if the extent was previously migrated from the first storage to the second storage at a previous time. The extent object includes for each track a write indicator indicating whether the track was updated in the second storage since the previous time when the extent was previously migrated to the second storage. In response to determining that the extent object exists, a determination is made of the tracks in the extent having the write indicator indicating that the track was updated in the second storage since the previous time. The data for the determined tracks is copied from the second storage to free locations in the first storage. For each determined track, the entry for the determined track in the extent object is updated to indicate the free location to which the data for the track was copied as an active address for the track.

11-24-2011

20100079885

System and method for providing performance-enhanced rebuild of a solid-state drive (SSD) in a solid-state drive hard disk drive (SSD HDD) redundant array of inexpensive disks 1 (RAID 1) pair - The present invention is a method for implementing a storage system. The storage system may include a disk array having a disk drive pair which includes a solid-state disk drive and a hard disk drive. The method may include the step of copying a data subset of a data set from the hard disk drive to a spare solid-state disk drive during a solid-state disk drive rebuild process. The data subset includes a first amount of data and the data set includes a second amount of data, where the first amount of data is less than the second amount of data. The method may further include the step of receiving a read request from a host server requesting the data subset. The method further includes the step of directing the read command to the spare solid-state disk drive. The method may further include the step of, prior to completion of copying of the data set from the hard disk drive to the spare solid-state disk drive, reading the data subset from the spare solid-state disk drive based upon the read command. Further, the disk array may be configured as a Redundant Array of Inexpensive Disks (RAID) configuration, such as a Level 1 RAID configuration (RAID 1 configuration) with the disk drive pair being a RAID disk drive pair, such as RAID 1 disk drive pair.

04-01-2010

20120300326

Shingle-written Magnetic Recording (SMR) Device with Hybrid E-region - SMR disk drives with hybrid E-regions that include a nonvolatile solid state memory E-region in addition to the magnetic media E-regions on disk are described. The memory E-region can be used in operations that will be referred as destaging and/or restaging to sequentialize sets of exception records to reduce the time and energy spent in executing seeks in the disk E-region. The ratio of the size of the solid state memory E-region to the total E-region capacity on the disks can be optimized for selected applications according to the invention using tradeoffs between performance and cost. For example, an embodiment with a memory E-region size that is 10% of the total disk E-region capacity achieves substantial performance enhancement over a disk-only E-region implementation and also results in smaller costs than would be required in a NAND-only memory E-region.

11-29-2012

20130271865

CREATING AN IDENTICAL COPY OF A TAPE CARTRIDGE - Embodiments of the invention relate to creating an identical copy of a source tape cartridge. One aspect of the invention includes copying data contents of a source data storage tape cartridge to a destination data storage tape cartridge. The tape of the source cartridge being formatted by a file system and including at least one metadata block containing data associated with the file system. Data blocks are read from the tape of the source cartridge to a memory buffer, thereby buffering the data blocks. Whether the data blocks read are file system metadata blocks and whether the file system metadata blocks include cartridge-specific and/or cartridge-dependent content is determined. The content is adapted to the destination cartridge, thereby creating consistent file system metadata on the tape of the destination cartridge. The buffered data blocks are written to the tape of the destination cartridge, thereby creating a file system on the tape of the destination cartridge that is a physical copy of both the file system and data contents on the tape of the source cartridge, and a consistent file system on the tape of the destination cartridge.

MAGNETIC TRANSFER DEVICE - A magnetic transfer device enables precise positioning of both disks while preventing generation of dust by sliding of a holder, and also secures a space for transfer magnet arrangement. A master disk on which is formed a magnetic signal pattern and a magnetic disk which is to receive transfer are accommodated and brought into close contact in opposition to each other within an interior space formed by a male-side holder which moves to approach and withdraw and a female-side holder. A plurality of positioning pins are brought into contact with the outer face of the male-side holder to position the male-side holder, and by installing the positioning pins at positions lower than both the master disk and the magnetic disk, dust generated by sliding of the positioning pins does not fall onto the face of the master disk or the magnetic disk.

04-29-2010

20120008224

MAGNETIC TRANSFER MASTER SUBSTRATE, MAGNETIC TRANSFER METHOD USING THE SUBSTRATE, AND MAGNETIC TRANSFER MEDIUM - A magnetic transfer master substrate includes a non-magnetic base having depressed portions formed on a surface thereof corresponding to an information signal array, a ferromagnetic body formed in the depressed portions and having a top portion thereof protruding above the surface of the non-magnetic base, and a non-magnetic protective film covering the surface of the non-magnetic base, except for the depressed portion thereof, and also covering a side portion of the ferromagnetic body. A section through the ferromagnetic body, taken perpendicularly to the substrate, includes a round corner, a curvature of which has a radius of no less than 1 nm and no more than 10 nm. The apex of the top portion of the ferromagnetic body protrudes above the surface of the non-magnetic base by 2 nm or more, and protrudes above the surface of the non-magnetic protective film by a distance less than the radius of the curvature.

01-12-2012

20110286124

MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD - In a magnetic recording medium and magnetic recording medium manufacturing method, it is possible to easily separate a conjoined body without carrying out shape processing in a transfer master in order to separate a conjoined body, and without scratching the magnetic recording medium in a separating step. Moreover, it is possible to mass-produce the magnetic recording medium efficiently without increasing the size of a device. As the central portion of a transfer master is caused to bow convexly in an upward direction, in a condition in which a press receiving surface portion of the transfer master is restrained by a pressing surface of a pressing member, the outer periphery of a magnetic recording medium in a conjoined body is easily separated from a transfer receiving medium contact region of the transfer master in such a way that a predetermined gap is formed.

11-24-2011

20090141382

MAGNETIC TRANSFER MASTER DISK AND METHOD FOR MANUFACTURING THE SAME - A magnetic transfer master disk including a magnetic layer and exhibiting excellent shape stability of a protrusion/recess pattern is provided. An initial layer formed of a conductive film is formed on a surface of a master on which a pattern of minute protrusions/recesses is formed, and then a magnetic layer (principal layer) is formed on the initial layer, and then, a metal layer is formed by means of electroforming. A duplicate in which the initial layer, the magnetic layer and the metal layer have been integrated is peeled off from the master, thereby obtaining a magnetic transfer master disk, which is a duplicate in which the magnetic layer and the initial layer are deposited on the protruded/recessed surface of the metal layer.

06-04-2009

20100079886

MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD USING THE SAME, AND MAGNETIC RECORDING MEDIUM - A magnetic transfer master carrier to be placed on a perpendicular magnetic recording medium, including: a concavo-convex pattern corresponding to magnetic information to be transferred to the medium by application of a magnetic field, wherein a length (La) of a convex portion in the concavo-convex pattern and a length (Sa) of a space between the convex portion and another convex portion adjacent to the convex portion satisfy 1.3≦(Sa/La)≦1.9, and wherein a cycle length (La+Sa) is in the range of 50 nm to 145 nm, where the length (La) is the width of the convex portion with respect to a circumferential direction measured at a height equivalent to 50% of the height of the convex portion, and the length (Sa) is the width of the space with respect to the circumferential direction measured at the height equivalent to 50% of the height of the convex portion.

04-01-2010

20090034108

TRANSFER METHOD, TRANSFER APPARATUS, AND RECORDING MEDIUM - A transfer method for transferring asperities formed on a master carrier or transfer information represented by the asperities onto a slave medium, comprises the step of bringing the master carrier on which microscopic asperities are formed into close contact with the slave medium by pressing the master carrier by pressure of fluid in a direct manner or an indirect manner through a flexible film. Deformation of the master carrier or the flexible film in a pressed region where the pressure of the fluid is applied is prevented, and transfer is performed while the master carrier is in close contact with the slave medium.

02-05-2009

20110181975

METHOD OF MANUFACTURING A MASTER DISK FOR MAGNETIC TRANSFER - A method of manufacturing a master disk for magnetic transfer is provided in which a pattern configuration does not change and burrs that require a polishing process are not generated. The method of manufacturing a master disk for magnetic transfer can include preparing a nonmagnetic body, forming a pattern of recessed parts on the nonmagnetic body, and forming a ferromagnetic material layer by depositing a ferromagnetic material on a surface of the nonmagnetic body having the pattern of recessed parts thereon. The method can further include forming a pattern of ferromagnetic material layers at the recessed parts by removing an excess portion of the ferromagnetic layer without using a mask. An etching rate of the nonmagnetic body can be larger than an etching rate of the ferromagnetic material layer in the operation of forming a pattern of ferromagnetic material layers at the recessed parts.

07-28-2011

360017000

With magnetic bias

16

20110317300

MAGNETIC TRANSFER MASTER SUBSTRATE, MAGNETIC TRANSFER METHOD AND METHOD OF MANUFACTURING THE SUBSTRATE - A magnetic transfer master substrate may have a ferromagnet pattern corresponding to a signal array. The substrate may include a non-magnetic base having depressed portions, formed on a surface thereof, which correspond to the signal array. A ferromagnet may be disposed in the depressed portions and includes a portion protruding above said surface. A section through the portion of the ferromagnet protruding from said surface taken perpendicularly to a surface of the substrate, includes a curved corner, a radius of curvature of which is no less than 2 nm and no more than 10 nm. The ferromagnet protrudes from the surface of the base by a distance no less than 2 nm and no more than 15 nm. A magnetic transfer method may include bringing the master substrate and a magnetic recording medium into contact and applying a magnetic field to record a magnetization pattern.

12-29-2011

20090303627

MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD, AND MAGNETIC RECORDING MEDIUM - A magnetic transfer master carrier including a base material having, in its surface, convex portions arranged correspondingly to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer having perpendicular magnetic anisotropy, the layer being provided on top and side surfaces of the convex portions, wherein the magnetic transfer master carrier forms a magnetic field pattern corresponding to the pattern of the information when a magnetic field is applied thereto.

12-10-2009

20110013303

MAGNETIC TRANSFER DEVICE AND MAGNETIC TRANSFER METHOD - A magnetic transfer device and method are provided. A magnetic field generating structure comprises a pair of permanent magnets connected to a return yoke. Respective magnetic poles of the magnets, of a different polarity from one another, oppose each other with a conjoined body disposed therebetween. The magnetic field generating structure is moved from a position at an outer periphery of the conjoined body, to a position at an inner periphery of the conjoined body, and then moved from the position at the inner periphery across the conjoined body toward the outer periphery, to a position outside of the conjoined body. The return yoke is positioned at a radially more outward position, toward the outer periphery, than are the permanent magnets. The movement of the magnetic field generating structure is carried out while maintaining a constant distance from the rotating conjoined body.

01-20-2011

20090244749

PRODUCTION METHOD OF MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD, AND MAGNETIC RECORDING MEDIUM - A production method of a magnetic transfer master carrier, the method including forming an imprint resist layer on a surface of a magnetic layer of a laminate which includes a first base material and the magnetic layer laminated thereon; forming a resist pattern, following shapes of concave portions of a mold, on the surface of the magnetic layer by pressing the concave portions against the imprint resist layer; and forming magnetic convex portions on the first base material by removing the mold from the imprint resist layer and then etching a surface of the magnetic layer which surface has no resist pattern, wherein the mold includes a second base material and the concave portions formed by etching a surface of the second base material so as to correspond to a pattern of information to be recorded on a magnetic recording medium

10-01-2009

20090244748

MAGNETIC TRANSFER MASTER CARRIER AND MAGNETIC TRANSFER METHOD - A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

10-01-2009

20090244747

MAGNETIC TRANSFER MASTER CARRIER AND METHOD FOR PRODUCING THE SAME - To provide a magnetic transfer master carrier obtained by forming a perpendicular magnetic anisotropy magnetic layer over a surface of an original master which has a concavo-convex pattern, placing a base material against the formed perpendicular magnetic anisotropy magnetic layer, and separating the base material.

10-01-2009

20090244746

MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM - A magnetic transfer method including initially magnetizing a disc-shaped perpendicular magnetic recording medium by applying, to the recording medium in a circumference direction, a magnetic field whose direction is inclined at an angle within a range of ±50° with respect to a perpendicular line (0°) to the medium surface, closely attaching a concavo-convex pattern of a magnetic transfer master carrier to the recording medium, and transferring magnetic information to the magnetic layer of the medium by applying a magnetic field to the recording medium and the master carrier closely attached to each other, wherein the concavo-convex pattern includes transfer portions on which surfaces a magnetic layer corresponding to the magnetic information is laid, and non-transfer portions which are concave portions, and wherein the magnetic layer has perpendicular magnetic anisotropy, a residual magnetization Mr of 500 emu/cc or lower, and a saturation magnetization Ms of 900 emu/cc or higher.

10-01-2009

20100079887

MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM - To provide a magnetic transfer method including: initially magnetizing a perpendicular magnetic recording medium in a perpendicular direction; closely attaching a magnetic transfer master carrier to the initially magnetized perpendicular magnetic recording medium; transferring magnetic information to the perpendicular magnetic recording medium by applying a perpendicular magnetic field which acts in the opposite direction to the direction of the initial magnetization, with the perpendicular magnetic recording medium and the magnetic transfer master carrier closely attached to each other; and separating the magnetic transfer master carrier, which is closely attached to the perpendicular magnetic recording medium, from the perpendicular magnetic recording medium, wherein in the separating, the magnetic transfer master carrier is separated from the perpendicular magnetic recording medium while applying another perpendicular magnetic field which acts in the opposite direction to the direction of the initial magnetization.

04-01-2010

20090251814

MAGNETIC TRANSFER MASTER CARRIER, MAGNETIC TRANSFER METHOD, AND MAGNETIC RECORDING MEDIUM - The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including:

10-08-2009

20090237823

MAGNETIC TRANSFER METHOD FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM - A magnetic transfer method including initially magnetizing a perpendicular magnetic recording medium by applying a DC magnetic field thereto in a perpendicular direction, and applying, to the perpendicular magnetic recording medium, a DC magnetic field for 100 nsec to 1 sec in an opposite direction to the magnetic field applied in initial magnetization with the recording medium being closely attached to a magnetic transfer master carrier which transfers magnetic information to the recording medium with being brought into contact with the recording medium, wherein the master carrier includes transfer portions on which surfaces a magnetic layer corresponding to magnetic information is laid, and non-transfer portions which are concave portions lower in height than the transfer portions, and wherein the magnetic layer has perpendicular magnetic anisotropy and has a residual magnetization Mr of 500 emu/cc or lower and a saturation magnetization Ms of 900 emu/cc or higher.

09-24-2009

20110002059

MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM - A magnetic transfer method includes a conjoined body formation step of stacking a transfer master storing transfer information on a transfer receiving body. Air between contact surfaces of the transfer master and transfer receiving body is pushed out in the direction of a non-pressurized area by pressurizing the stacked transfer master and transfer receiving body, to form the conjoined body. The method further includes a transfer step of, by bringing a magnetic field generating module close to the conjoined body, and applying a magnetic field, carrying out a magnetic transfer of the transfer information from the transfer master to the transfer receiving body. A surface roughness of smooth portions of the transfer master in which no transfer information is formed, and the surface roughness of the transfer receiving body, is 1 nm or less.

MAGNETIC TRANSFER METHOD AND MAGNETIC TRANSFER DEVICE - A system and method for magnetic transfer. A magnetic transfer device includes a plurality of pairs of magnetic field generating units that apply a magnetic field to a contact body which includes a master disk in close contact with a magnetic recording medium, wherein the master disk has a pattern of preformatted signals. The magnetic field generating units, falling within a specified length range, are moved in synchrony at a predetermined speed in the directions of the outer periphery while the contact body is caused to rotate by a rotation drive unit. The system and method provide a magnetic transfer method and a magnetic transfer device that, by reducing the area of magnetic field generating units that apply a transfer magnetic field, can reduce an attractive force (or repulsive force) between the magnets, and furthermore, shorten a processing time for the transfer.

10-06-2011

20110157735

METHOD OF MAGNETIC TRANSFER AND A MAGNETIC RECORDING MEDIUM - A method of magnetic transfer, including placing a first medium in contact with a second medium, pressing the first and second media together to form an adhered body, applying a magnetic field to the adhered body, and moving the magnetic field relatively to the adhered body, so as to transfer information from the first medium to the second medium. Then the monitoring of the adhered body is performed to detect existence of an air bubble between the first and second media.

06-30-2011

20090073593

MASTER CARRIER FOR MAGNETIC TRANSFER, MAGNETIC TRANSFER METHOD AND MAGNETIC RECORDING MEDIUM - A master carrier for magnetic transfer includes a transfer portion on which a magnetic layer corresponding to magnetic information for transfer is formed, and a non-transfer portion forming a concave shape relatively low with respect to the transfer portion having the magnetic layer, wherein the magnetic layer of the transfer portion has perpendicular magnetic anisotropy, with residual magnetization Mr of 500 emu/cc or less, and saturation magnetization Ms of 900 emu/cc or more. CoPt can be used as a material of the magnetic layer, and use of Co

03-19-2009

20080239533

METHOD OF MAGNETIC TRANSFER AND MAGNETIC RECORDING MEDIUM - The present invention provides a method of magnetic transfer comprising: an initial magnetization step of performing an initial magnetization by applying a DC magnetic field perpendicular to a disk shaped perpendicular magnetic recording medium which is formed by laminating a soft magnetic layer and a magnetic layer on a substrate; an initial magnetization cleaning step of applying an in-plane magnetic field having an intensity larger than 100 [Oe] and less than an intensity of Hn, to the perpendicular magnetic recording medium after passed through the initial magnetization step in radial direction which directed from a center to an outer of the perpendicular magnetic recording medium. After or in a time of the magnetic transfer, a magnetic cleaning may be performed by applying an in-plane magnetic field having the same intensity as the initial magnetization cleaning step in radial direction instead of the initial magnetization cleaning or in combination.